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Finding the Fourth Proportional to 898.57, 1,347.17 and 806.99

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Solution

The fourth proportional to 898.57, 1,347.17 and 806.99 is: 1,209.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.57 : 1,347.17 = 806.99 : x
  2. Step 2: Convert to fraction form
    898.57/1,347.17 = 806.99/x
  3. Step 3: Cross multiply
    898.57x = 1,347.17 × 806.99
  4. Step 4: Simplify right side
    898.57x = 1,087,152.72
  5. Step 5: Solve for x
    x = 1,087,152.72/898.57
  6. Step 6: Final answer
    x = 1,209.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.